<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class='el-icon-arrow-right'>
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品添加</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图    -->
    <el-card>
      <!-- 提示区域-->
      <el-alert title='添加商品信息' type='info' center show-icon :closable='false'>
      </el-alert>
      <!--步骤条-->
      <el-steps :space='200' :active='activeIndex - 0' finish-status='success' align-center>
        <el-step title='基本信息'></el-step>
        <el-step title='商品信息'></el-step>
        <el-step title='商品属性'></el-step>
        <el-step title='商品图片'></el-step>
        <el-step title='商品内容'></el-step>
        <el-step title='完成'></el-step>
      </el-steps>
      <!--Tab栏区域-->
      <el-form :model='addForm' :rules='addFormRules' ref='addFormRef' label-width='100px' label-position='top'>
        <!--tab栏区域-->
        <el-tabs :tab-position="'left'" v-model='activeIndex' :before-leave='beforeTabLeave' @tab-click='tabClick'>
          <el-tab-pane label='基本信息' name='0'>
            <el-form-item label='商品名称' prop='goods_name'>
              <el-input v-model='addForm.goods_name'></el-input>
            </el-form-item>
            <el-form-item label='商品价格' prop='goods_price'>
              <el-input v-model='addForm.goods_price' type='number'></el-input>
            </el-form-item>
            <el-form-item label='商品重量' prop='goods_weight'>
              <el-input v-model='addForm.goods_weight' type='number'></el-input>
            </el-form-item>
            <el-form-item label='商品数量' prop='goods_number'>
              <el-input v-model='addForm.goods_number' type='number'></el-input>
            </el-form-item>
            <el-form-item label='商品分类' prop='goods_cat'>
              <el-cascader
                v-model='addForm.goods_cat'
                :options='catelist'
                :props='cateProps'
                @change='handleChange'></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label='商品参数' name='1'>
            <!--渲染表单item项-->
            <el-form-item :label='item.attr_name' v-for='item in manyTableData' :key='item.attr_id'>
              <!--复选框区域-->
              <el-checkbox-group v-model='item.attr_vals'>
                <el-checkbox :label='cb' v-for='(cb, i) in item.attr_vals' :key='i' border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label='商品属性' name='2'>
            <el-form-item :label='item.attr_name' v-for='item in onlyTableData' :key='item.attr_id'>
              <el-input v-model='item.attr_vals'></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label='商品图片' name='3'>
            <el-upload
              :action='uploadURL'
              :on-preview='handlePreview'
              :on-remove='handleRemove'
              list-type='picture' :headers='headersObj' :on-success='handleOnsuccess'>
              <el-button size='small' type='primary'>点击上传</el-button>
              <div slot='tip' class='el-upload__tip'>只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label='商品内容' name='4'>
            <!--富文本编辑器-->
            <quill-editor v-model='addForm.goods_introduce'></quill-editor>
            <!--添加商品按钮-->
            <el-button type='primary' class='btnAdd' @click='add'>添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!--图片预览区域-->
    <el-dialog title='图片预览' :visible.sync='previewVisible' width='50%'>
      <img :src='previewPath' class='previewImg'>
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  name: 'Add',
  data() {
    return {
      activeIndex: 0,
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数据
        goods_cat: [],
        // 图片数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
      },
      // 商品分类列表
      catelist: [],
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 上传图片地址
      uploadURL: 'http://timemeetyou.com:8889/api/private/v1/upload',
      // 图片上传组件请求头
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！')
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    // 级联选这起选中变化
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
      console.log(this.addForm.goods_cat)
    },
    //
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类!')
        return false
      }
    },
    async tabClick() {
      // 访问商品参数tab
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品参数失败!')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败!')
        }
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const index = this.addForm.pics.findIndex(item => item.pic === filePath)
      this.addForm.pics.splice(index, 1)
    },
    // 监听图片上传成功实践
    handleOnsuccess(response) {
      // 拼接图片对象
      const picInfo = { pic: response.data.tmp_path }
      // 将图片push到this.pics
      this.addForm.pics.push(picInfo)
    },
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加流程
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理参数与属性
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        await this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang='less' scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}

.previewImg {
  width: 100%;
}

.btnAdd {
  margin-top: 10px
}
</style>
